Chords in Orchestral Score Margin question

Hello, been doing a bit of correction and preparation for multiple arrangements lately, and the concept of this is quite simple. Orchestra based, but with space to improvise over chord changes. Arranger would like chords implemented throughout charts, for each part that you see in the picture below. Problem is that obviously putting in all those chords for every instrument that can solo makes it so the margins are too high and you start losing master score visibility on the bottom pages. Is there any way to chord everything without this happening? Can't seem to find what I'm looking for browsing around. Thanks in advance for any input.